James c



(No Model.) I

- J. G. SCOTT.

DI-VIDING ENGINE. 7

No. 247,853. Patented Oct. 4,1881.

WITNESSEFW s INENTOR: m I 555 2 v BY w ATTORNEY.

UNITED STATES PATENT OFFICE.

JAMES C. SCOTT, OF MANCHESTER, COUNTY OF LANCASTER, GREAT BRITAIN.

DIVIDING-ENGINE SPECIFIGATIONforming part of Letters Patent No. 247,853, dated October 4, 1881. 1

Application filed January 28, 1881. (N0 model.) Patented in England March 15, 1878.

To all whom it may concern;

Be it known that I, JAMES CUTnBER'r Soo'rT,

ofManchester, in the county ofLancaster,Great Britain, have in ven ted new and useful Improvementsin ApparatusforSettingOut,Marking,or Cutting Divisions of Circles or Straight Lines, of which the following is a specification.

My invention consists in an arrangement whereby I am enabled to dispense with changewheels, and to secure an increased accuracy of division. To accomplish-this 1 cause the handle which gives motion to the movable part always to start from the same pointand to tinish after the required number ofturns and fraction of a turn against an adjustable stop on a graduated disk, after which it is turned in the reverse direction back to the starting-point.

In the accompanying drawings, Figure 1' is a plan view of the apparatus, partly in section. Fig. 2 is another plan view, not in section, and omitting a portion of Fig. 1; and Fig. 3 a face view of Fig. 2.

Similar letters of reference indicate corre' sponding parts.

At a is a fixed hearing, which may be attached to any suitable frame of the machine to which the dividing apparatus is to be applied. This bearing is formed hollow, and through it there passes a shaft, 12, one end of which is provided with a worm, c, in gear with a wheel, d, which is mounted so as to be capable of turning upon a center, 0. Upon the other end of the axis 1) is mounted loosely a handle,f, but it is capable of being made fast with the shaft 12 by means of a clamp, g, and in the following I manner:

The handlefextends from an arm, h, which is provided with two jaws, t 'i, which embrace the shaft 11, and these jaws are capable of being tightened on the shaft 1) by means ofa handie, it, which carries a screw, 1, working in'the said jaws t.

From the arm It extends a boss, m, and upon an extension, at, of the bearin g a. there is a disk, 1m mounted loosely, but capable of being made fast with the said part a by means of a thumbscrew, 0. The said disk is formed with a circula'r slot, 1), within which is adapted a stop, q, capable of being fixed in any position around the circle by means of a set screw, 1', and the face q of this stop may therefore be made to represent any one of the divisions marked upon the periphery of the disk 11, as shown in Fig. 2. These divisions, however, are only partially shown; but they extend around the entire circumference of the disk.

The handle f is provided with a groove, 8,

within which is situate a trigger, it t, capable of turning upon a center, a, the part t being forced inward by a spring, o, carried by the groove of the said handle, and when so forced inward it takes into a notch, 20, formed on the edge of the disk n. l

'The operation is as follows: The attendant, by tightening the clamp i g, makes the handle f fast with the shaft 12, and the stop q is adjusted, so that when the trigger t arrives in contact therewith the trigger will be forced by the spring v into the notch w, and thus the starting-point, which is constant, is attained.

Suppose, now; that an entire revolution ofthe handlefis desired, the trigger t is moved from the notch w by pressing the part if against the force of the spring 1;, and the said revolution is performed, the stop q being turned upward upon a center to admit of the said entire revo lution, after which the trigger t again passes into the notch w, and so on for any required number of whole revolutions. Supposing, now, however, that, say, three and a portion only of fourth turn are required, then the calculation is made in the ordinary manner in order to ascertain what portion of a revolution in addition to the three whole revolutions is required, and

the stop q is set upon the disk a by means of the graduations marked thereon, so that the actual stopping part will bring the zero lineto coincide with that graduation which corresponds to the fraction of a circle beyond the Whole revolutions through which the handlev in the reverse direction back to its notch 10, and the same operations are repeated, the said notch always being the starting-point, and, therefore, in this apparatus there is one notch only, the finishing points for parts of a circle being an adjustable stop.

In order to prevent any undue motion of the worm c a bindingscrew, as at :0, may be adapted and tightened between each working of the handlef.

My invention is adapted to be applied to a variety of purposes. It can be used for giving intermittent motion to the pattern of a moldingmachine of that class in which a segmental pattern is used and which is carried by a radial arm, as is well known, then the said radial arm will be connected to the wheel d, and the segmental pattern will be caused to move at intervals through the necessary spaces for molding successive teeth of wheels. In like manner the wheel (I may give motion to the mold-box in' stead of to the pattern, such motion of the mold-box being well known.

In lashes for cutting wheels or setting out, the wheel 01 may be placed behind the faceplate, and after the same manner my invention may be adapted generally to machines for cutting, marking, or setting out divisions of circles; but none of such arrangements constitute any part of my invention.

In markingor settingoutdivisionsin straight lines, as in the case of rules, the worm or screw 0 may be continued for the necessary length, and constitute the ordinary screw for traversing the cutting or marking tool.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent- In apparatus for settingout, cutting, or working divisions on circular or straight lines, the handlef provided with trigger t t, clamp ig, graduated disk at n, provided with groove 1) and notch 10, and the stop q, combined together on shaft a, substantially as shown and described for operation as specified.

JAMES C. SUO'IT.

Witnesses:

E. ROBINSON \VALKER, Solicitor, 10 St. Ann St, JiIanc/wster.

\V. T. CHnE'rHAM, Patent Agent, 18 St. Ann St, illanchcstcr. 

